On 4 Apr 2017, at 18:01, Ben Coman <btc@openInWorld.com> wrote:

On Tue, Apr 4, 2017 at 10:12 PM, Denis Kudriashov <dionisiydk@gmail.com> wrote:
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> 2017-04-04 15:47 GMT+02:00 Esteban Lorenzano <estebanlm@gmail.com>:
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>> no it doesn't: squeak does not have that primitive, that���s why it does not fails :)
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> I think you are wrong because I check it carefully in Squeak and I found it on github https://github.com/OpenSmalltalk/opensmalltalk-vm/search?utf8=���&q=primitiveFindSubstring&type=.

still is not there, because is not the same primitive :)

look, this is the way where it is generated: 

translatedPrimitives

"an assorted list of various primitives"

(ByteString compiledMethodAt: #findSubstringViaPrimitive:in:startingAt:matchTable: ifAbsent: []) ifNotNil:

[^#("Pharo uses findSubstringViaPrimitive:in:startingAt:matchTable:"

(Bitmap compress:toByteArray:)

(Bitmap decompress:fromByteArray:at:)

(Bitmap encodeBytesOf:in:at:)

(Bitmap encodeInt:in:at:)

(ByteString compare:with:collated:)

(ByteString translate:from:to:table:)

(ByteString findFirstInString:inSet:startingAt:)

(ByteString indexOfAscii:inString:startingAt:)

(String findSubstringViaPrimitive:in:startingAt:matchTable:)

(ByteArray hashBytes:startingWith:)

(SampledSound convert8bitSignedFrom:to16Bit:))].

^#(

(Bitmap compress:toByteArray:)

(Bitmap decompress:fromByteArray:at:)

(Bitmap encodeBytesOf:in:at:)

(Bitmap encodeInt:in:at:)

(ByteString compare:with:collated:)

(ByteString translate:from:to:table:)

(ByteString findFirstInString:inSet:startingAt:)

(ByteString indexOfAscii:inString:startingAt:)

(ByteString findSubstring:in:startingAt:matchTable:)

(ByteArray hashBytes:startingWith:)

(SampledSound convert8bitSignedFrom:to16Bit:)

)

means that Pharo uses #indSubstringViaPrimitive:in:startingAt:matchTable: while squeak uses #findSubstring:in:startingAt:matchTable:. 

Now, there is a bug there (because source is in String and not in ByteString), and I can fix that by asking correctly, but: 

1) this means that sources for pharo and squeak will be different and pharo needs to be generated in pharo. This is contrary to what we are trying to do with the VM: we want all sources to be the same, and differences should come from compilation flags and/or the presence of certain plugins (this is because is a lot easier to debug the VM like that). 

2) I wonder��� why we are using this primitive an squeak is not? maybe we need to deprecate the use?

I believe Esteban's point Its not so much whether the VM has it
(since they are essentially the same VM + extra C-libs for Pharo)
but whether the Squeak Image is using it.

Squeak does use primitiveFindSubstring, but a difference is attached to ByteString rather than String.
That was added to Squeak 2015.05.01.  Squeak String seems to have never used the primitive (since 2005). 

this is the important thing, I think��� so��� why can���t we use that instead the other one?

what���s the difference?